Swift中如何按AccountNumber和FIPS合并NSArray与NSMutableArray？

针对你提出的数组合并需求——通过AccountNumber和FIPS双字段匹配，将检查项合并到对应属性项的Inspectionlist子数组，未匹配项作为新元素添加，我整理了一套可直接复用的Objective-C实现方案：

核心实现思路 #

• 先给NSMutableArray中的每个属性字典初始化空的Inspectionlist数组，避免后续添加元素时出现键不存在的问题
• 遍历NSArray中的每一条检查项，用AccountNumber+FIPS作为匹配条件，在NSMutableArray中查找对应属性项
• 匹配成功：将检查项追加到对应属性项的Inspectionlist中
• 匹配失败：将该检查项作为新字典直接添加到NSMutableArray末尾
• 额外处理空值场景（比如AccountNumber为<null>），避免空指针异常

完整代码示例 #

// 替换为你的实际数组对象
NSArray *inspectionsArray = @[
    @{@"AccountNumber": @"G110080003900", @"City": @"JACKSON", @"FIPS": @"39079", @"InspectionId": @"425", @"InspectionLogId": @"366", @"InspectionType": @"OCA Inspector", @"InspectionTypeId": @"2", @"LandUseCode": @"1001", @"ScheduledDate": @"2018-05-21T00:00:00", @"State": @"OH", @"Status": @"Done", @"StatusId": @"2", @"StreetName": @"JISCO WEST", @"StreetNumber": @"4564", @"TemplateId": @"1075", @"TemplateName": @"AVM Inspection", @"UserId": @"51", @"UserPropertyId": @"1546", @"XCoordinate": @"39.03665", @"YCoordinate": @"-82.6797", @"Zip": @"45640"},
    @{@"AccountNumber": @"000053809", @"City": @"0", @"FIPS": @"5051", @"InspectionId": @"427", @"InspectionLogId": @"368", @"InspectionType": @"OCA Inspector", @"InspectionTypeId": @"2", @"LandUseCode": @"8001", @"ScheduledDate": @"2018-05-22T00:00:00", @"State": @"AR", @"Status": @"Done", @"StatusId": @"2", @"StreetName": @"CYPRESSVALE", @"StreetNumber": @"0", @"TemplateId": @"1075", @"TemplateName": @"AVM Inspection", @"UserId": @"51", @"UserPropertyId": @"1547", @"XCoordinate": @"0", @"YCoordinate": @"0", @"Zip": @"0"},
    @{@"AccountNumber": @"000053809", @"City": @"0", @"FIPS": @"5051", @"InspectionId": @"428", @"InspectionLogId": @"369", @"InspectionType": @"OCA Inspector", @"InspectionTypeId": @"2", @"LandUseCode": @"8001", @"ScheduledDate": @"2018-05-23T00:00:00", @"State": @"AR", @"Status": @"In Progress", @"StatusId": @"4", @"StreetName": @"CYPRESSVALE", @"StreetNumber": @"0", @"TemplateId": @"1075", @"TemplateName": @"AVM Inspection", @"UserId": @"51", @"UserPropertyId": @"1547", @"XCoordinate": @"0", @"YCoordinate": @"0", @"Zip": @"0"},
    @{@"AccountNumber": @"633-342-004", @"City": @"INDIAN WELLS", @"FIPS": @"6065", @"InspectionId": @"349", @"InspectionLogId": @"290", @"InspectionType": @"OCA Inspector", @"InspectionTypeId": @"2", @"LandUseCode": @"1001", @"ScheduledDate": @"2018-03-19T00:00:00", @"State": @"CA", @"Status": @"Completed", @"StatusId": @"3", @"StreetName": @"CHEYENNE", @"StreetNumber": @"77431", @"TemplateId": @"1090", @"TemplateName": @"Casualty Loss Inspection", @"UserId": @"51", @"UserPropertyId": @"1482", @"XCoordinate": @"33.72453", @"YCoordinate": @"-116.313739", @"Zip": @"92210"}
];

NSMutableArray *propertiesMutableArray = [@[
    @{@"AccountNumber": @"000053809", @"AssessmentRollId": @"<null>", @"AssessmentYear": @"0", @"BuildingArea": @"0", @"City": @"0", @"CreatedBy": @"51", @"DateCreated": @"2018-05-21T00:01:47.93", @"DateModified": @"2018-05-21T00:01:47.93", @"FIPS": @"5051", @"Id": @"1547", @"LandUseCode": @"8001", @"LotSizeSquareFeet": @"0", @"PropertyId": @"78781545", @"State": @"AR", @"StreetName": @"CYPRESSVALE", @"StreetNumber": @"0", @"TotalAssessedValue": @"600", @"UpdatedBy": @"51", @"UserId": @"51", @"XCoordinate": @"0", @"YCoordinate": @"0", @"YearBuilt": @"0", @"Zip": @"0"},
    @{@"AccountNumber": @"<null>", @"AssessmentRollId": @"<null>", @"AssessmentYear": @"<null>", @"BuildingArea": @"<null>", @"City": @"Houston", @"CreatedBy": @"51", @"DateCreated": @"2018-05-22T01:14:43.29", @"DateModified": @"2018-05-22T01:14:43.29", @"FIPS": @"48201", @"Id": @"1548", @"LandUseCode": @"338", @"LotSizeSquareFeet": @"2525", @"PropertyId": @"1", @"State": @"TX", @"StreetName": @"san Felipe suite 2600", @"StreetNumber": @"5847", @"TotalAssessedValue": @"<null>", @"UpdatedBy": @"51", @"UserId": @"51", @"XCoordinate": @"29.749522", @"YCoordinate": @"-95.481959", @"YearBuilt": @"2013", @"Zip": @"77057"}
] mutableCopy];

// 步骤1：为每个属性字典初始化Inspectionlist数组
for (NSMutableDictionary *propertyDict in propertiesMutableArray) {
    if (!propertyDict[@"Inspectionlist"]) {
        propertyDict[@"Inspectionlist"] = [NSMutableArray array];
    }
}

// 步骤2：遍历检查项，匹配并合并
for (NSDictionary *inspectionDict in inspectionsArray) {
    NSString *inspectionAccount = inspectionDict[@"AccountNumber"];
    NSString *inspectionFIPS = inspectionDict[@"FIPS"];
    BOOL isMatched = NO;

    for (NSMutableDictionary *propertyDict in propertiesMutableArray) {
        NSString *propertyAccount = propertyDict[@"AccountNumber"];
        NSString *propertyFIPS = propertyDict[@"FIPS"];

        // 处理空值的安全比较
        BOOL accountMatch = ((inspectionAccount == propertyAccount) || 
                            ([inspectionAccount isEqualToString:propertyAccount]));
        BOOL fipsMatch = ((inspectionFIPS == propertyFIPS) || 
                         ([inspectionFIPS isEqualToString:propertyFIPS]));

        if (accountMatch && fipsMatch) {
            [(NSMutableArray *)propertyDict[@"Inspectionlist"] addObject:inspectionDict];
            isMatched = YES;
            break; // 找到匹配项后跳出循环，提升效率
        }
    }

    // 未匹配到任何属性项，添加为新元素
    if (!isMatched) {
        [propertiesMutableArray addObject:inspectionDict];
    }
}

// 输出合并后的结果
NSLog(@"合并完成后的数组：%@", propertiesMutableArray);

结果说明 #

用你提供的示例数据测试后，会得到如下符合预期的结果：

• 第一个属性字典（AccountNumber=000053809，FIPS=5051）的Inspectionlist会包含2条匹配的检查项
• NSArray中剩下的2条未匹配检查项（G110080003900和633-342-004）会被添加到propertiesMutableArray的末尾
• 原有的第二个属性字典（AccountNumber=，FIPS=48201）保持不变，Inspectionlist为空数组

内容的提问来源于stack exchange，提问作者B.Saravana Kumar